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A kind of silicon-acrylic emulsion preparation method that can be used to prepare polymer cement-based waterproof coating

A technology of waterproof coating and polymeric emulsifier, applied in cement coatings, coatings, etc., can solve the problems of water resistance and other comprehensive properties that are difficult to meet the above requirements, and achieve improved water resistance and storage stability, good water resistance, cohesion low effect

Active Publication Date: 2022-03-11
江苏雨中情防水材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the promulgation of the general specification for waterproofing of buildings and municipal engineering, it puts forward clear regulations on the working life of engineering waterproof design, which puts forward stricter requirements on the water resistance of waterproof materials. Currently, the acrylic emulsion commonly used in the market It is difficult to meet the above requirements in terms of comprehensive properties such as polymer cement waterproof coating water resistance. In order to meet the continuous improvement of people's requirements for building waterproofing, it is necessary to develop emulsions that can be used to prepare water resistance and other comprehensive properties.

Method used

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  • A kind of silicon-acrylic emulsion preparation method that can be used to prepare polymer cement-based waterproof coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, add 0.2 parts of allyloxy nonylphenol polyoxyethylene ether, 0.7 parts of allyloxy nonylphenol polyoxyethylene ether ammonium sulfate into the reactor, anion / nonionic polymerizable emulsifier, 56 parts After the water is stirred evenly, slowly add 10 parts of methacrylic acid and 5 parts of ethyl methacrylate, heat up while stirring, and react at 50°C for 30 minutes to obtain a stable milky white pre-emulsion; adjust the pH value with a pH regulator To 7.5±0.1, heat up to 80°C, then add 1 / 3 of the initiator aqueous solution consisting of 0.5 parts of ammonium persulfate and 16 parts of water dropwise, and the water-soluble initiator aqueous solution of the mixed liquid, and react for a certain period of time to nucleate, Obtain a blue seed emulsion; Slowly add 23 parts of methacrylic acid, 6 parts of ethyl methacrylate, 11 parts of mixed monomers composed of hydroxypropyl acrylate, and 0.5 parts of allyloxynonylphenol Anionic / nonionic polymerizable emulsifier com...

Embodiment 2

[0023] First, add 0.3 parts of allyloxy nonylphenol polyoxyethylene ether, 0.6 parts of allyloxy nonylphenol polyoxyethylene ether ammonium sulfate into the reactor, anion / nonionic polymerizable emulsifier, 56 parts After the water is stirred evenly, slowly add 9 parts of methacrylic acid and 3 parts of ethyl methacrylate, heat up while stirring, and react at 50°C for 30 minutes to obtain a stable milky white pre-emulsion; adjust the pH value with a pH regulator To 7.5±0.1, heat up to 80°C, then add 1 / 3 of the initiator aqueous solution consisting of 0.5 parts of ammonium persulfate and 16 parts of water dropwise, and the water-soluble initiator aqueous solution of the mixed liquid, and react for a certain period of time to nucleate, Obtain blue seed emulsion; Slowly add 24 parts of methacrylic acid, 10 parts of ethyl methacrylate, 8 parts of mixed monomers of hydroxypropyl acrylate, 0.6 parts of allyloxynonylphenol Anionic / nonionic polymerizable emulsifier composed of polyoxy...

Embodiment 3

[0027] First, add 0.3 parts of allyloxy nonylphenol polyoxyethylene ether, 0.5 parts of allyloxy nonylphenol polyoxyethylene ether ammonium sulfate into the reactor, anion / nonionic polymerizable emulsifier, 54 parts After the water is stirred evenly, slowly add 11 parts of methacrylic acid and 4 parts of ethyl methacrylate, heat up while stirring, and react at 50°C for 30 minutes to obtain a stable milky white pre-emulsion; adjust the pH value with a pH regulator To 7.5±0.1, heat up to 80°C, then add 1 / 3 of the initiator aqueous solution consisting of 0.5 parts of ammonium persulfate and 16 parts of water dropwise, and the water-soluble initiator aqueous solution of the mixed liquid, and react for a certain period of time to nucleate, Obtain a blue seed emulsion; Slowly add 22 parts of methacrylic acid, 7 parts of ethyl methacrylate, 12 parts of mixed monomers composed of hydroxypropyl acrylate, and 0.4 parts of allyloxynonylphenol Polyoxyethylene ether, 1.4 parts of anion / non...

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Abstract

The invention discloses a method for preparing a silicon-acrylic emulsion that can be used for preparing polymer cement-based waterproof coatings. Using emulsion polymerization method, vinyl monomers, vinyl-containing functional silicone monomers, etc. The initiator and the remaining monomers are added dropwise to carry out free radical polymerization of the double bond, and finally the reaction is quenched in an ice-water bath, and the pH value is adjusted to obtain a silicon-acrylic emulsion with a core-shell structure. The silicon-acrylic emulsion prepared by the present invention prepares polymer cement-based waterproof coatings, which can not only significantly improve the water resistance and mechanical properties of the waterproof coating, but also because the silicon-oxygen bonds on the molecular structure are arranged neatly toward the outer layer, the coating has Excellent water repellency and air and moisture permeability, improving the problem of drumming and shedding when applied on wet base surfaces.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing a silicon-acrylic emulsion that can be used for preparing polymer cement-based waterproof coatings. Background technique [0002] With the promulgation of the general specification for waterproofing of buildings and municipal engineering, it puts forward clear regulations on the working life of engineering waterproof design, which puts forward stricter requirements on the water resistance of waterproof materials. Currently, the acrylic emulsion commonly used in the market The comprehensive properties such as water resistance of polymer cement waterproof coatings are difficult to meet the above requirements. In order to meet the continuous improvement of people's requirements for building waterproofing, it is necessary to develop emulsions that can be used to prepare water resistance and other comprehensive properties. Contents of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/18C08F220/20C08F230/08C08F216/14C08F2/26C08F2/30C09D133/02C09D7/61C09D1/08
CPCC08F220/06C09D143/04C09D7/61C09D1/08C08K2003/265C08F220/1802C08F220/20C08F230/085C08F216/1433C08F216/1475C08K3/26C08K3/36C08K3/34
Inventor 李晴龙耿进玉李东
Owner 江苏雨中情防水材料有限责任公司